This work contextualizes military airworthiness certification and its importance for aerospace products. Additionally, it summarizes the military aircraft Type Certification process applied to the KC-390 and F-39 projects, listing good practices for the proposition of application in the space context. For this, the work: 1) reviews and analyzes the national and international context and identifies Sweden and Brazilian military certification processes; 2) Presents the spaceworthiness process used in Brazil; and 3) Compares processes present and validates suggestions for improvement. At the end of the work, it was possible to understand the processes and their standards and present some activities and examples of their application in spaceworthiness. In addition, the practices adopted can serve as an example for other industries and applications.